re SO3 % in hot meal

Hello XXX-Engr,

SO3 volatility is a complicated function of many different dynamic variables, including temperature, alkali/sulphur balance, kiln inlet oxygen, burner efficiency, type of sulphur present in the raw materials and fuels etc.

Therefore, it would be almost impossible to accurately calculate your hot meal SO3 content. You can however calculate the SO3 of your clinker if you know the sulphur content, ash content and feed rates of your fuels, as well as the sulphur content and LOI
of your raw meal, plus the raw meal feed rate to the kiln.

A hot meal SO3 content of 0.65% is exceptionally good, especially for a kiln burning petcoke, but certainly quite possible, as long as the alkali/sulphur balance is close to 1.0, the kiln inlet oxygen is at least 2-3% and the burning zone temperature is
not excessive,.